Question

ME RESPONDAMMMMM POR FAVORRRRRR
(2-1/3)-²-21⁰ ​

Answer 1

Resolva dentro do parênteses primeiro.

$(2-\frac{1}{3} )^{-2} - 21^{0} =\\\\(\frac{6-1}{3} )^{-2} - 1 =\\\\(\frac{5}{3})^{-2} - 1 =\\\\(\frac{3}{5} )^{2} - 1 =\\\\\frac{9}{25} - 1 =\\\\\frac{9 - 25}{25} = \\\\-\frac{16}{25}$